docs: def getOverlayImageData(self, ulOverlayHandle, pvBuffer, unBufferSize):
          """
          Gets the raw image data from an overlay. Overlay image data is always returned as RGBA data, 4 bytes per pixel. If the buffer is not large enough, width and height 
          will be set and VROverlayError_ArrayTooSmall is returned.
          """
  
          fn = self.function_table.getOverlayImageData
          punWidth = c_uint32()
          punHeight = c_uint32()
          result = fn(ulOverlayHandle, pvBuffer, unBufferSize, byref(punWidth), byref(punHeight))
          return result, punWidth.value, punHeight.value